build an openbsd router/modem

[Frank White]

I want build a router/modem with openbsd. My is that I don't want
anykind of linux code around. I don't have any problems to build a
router, my problem is to have a modem without any linux firmware.
Anyone know if there are any pure modem to use it ?
Or any chip I can connect on any "itx or what u want" motherboard ?
Thank u
Luigi